aren't the engine coolant temp sensor(ECT) and the temp gauge
sensor("sending unit") separate?
the ECT feeds the ECU,and the temp gauge sensor feeds the gauge directly.
Also,the ECT is a OFF/ON switch,and the temp sensor is a thermistor.
that's how it shows in my Haynes manual for Integra and 96-00 Civic.
According to that manual,the temp gauge sending unit has a single wire and
is next to the distributor,the ECT is on the thermostat housing,has a 2-
why? unless there's something /seriously/ wrong, water pump won't
affect the temp shown on the gauge. there are three water temp sensors
- one for the ecu, one for the gauge, and one for the radiator fan
switch. the one you want is the single wire doo-dad under the
distributor. check for good electrical connection, then test the gauge.
at this stage, the honda manual from helminc.com is going to be a good
investment for you as well.
If the system would never turn on the fan, and the gauuge always shows
COLD, it sounds like you've always had AIR in the system since the rad
was repaired. The reservoir has to be kept at MAX (per the owner's
manual) whenever you've had work done on the cooling system. Yes, you'll
blow up (old) hoses if the system is full of air and the thermostat
can't open if it's not immersed in hot water.
If it was mine, I'd top up the rad _and reservoir_ DAILY and see how
long it takes to stop 'sipping' coolant. As the air is displaced the
coolant level drops overnight.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.